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lSAMUEL A'n.nooKs, loir BALTIMQRE, MARYLAND.-

Leners Patent No. 92,258,1dazea July 6,1869.

INTRGVEMENT IN PROCESS POR SOLDER-ING- THE- JOINTS ANDSEA'MS 0I' IEETALLIG VESSELS.

The Schedule referred to in those Letters Patent. and makingpm of the same.

To allai/'hom it may concern Bel it known that I, SAMUEL D. BROOKS, of the ,city and county ot' Baltimore, in the State of Marylamhfhave invented .a new andv useful 'Process for Soldering and Securing `the Joints and Scams of Tin Cans,

and other Metallic Vessels;'and i do hereby declareth'e following to a full and exact ldescription there- The nature of my invention consists-4 First, indipping one or both of the two edgesor surfaes, which are to form each'joiut or seam of a.A metal- 1i@ YLSSel, into a both of molten solder-or solderingmetal, before the joint orsealu is formed.

Secondly,tafter the molten metal has cooled and .hardened theron in subsequently forming a joint or seam therewith;- and Thirdly, dosingnlid securing saidjo'nt, by simply heating the edgesin contact sutliciently to produce a fusion of the solderenclosed thci'ein.

'.lhe object of my invention is to produce a joint as strongand tight as any yetproduced, without the labor and expense attendingthe soldering of cans by any' ot' thevordiuary processes heretoforeemployed, and. without the expensive apparatus required in unitiug'seams by heat and pressure alone, without solder.

llo enable others skilled in the art, to? use and practise my invention, 1- will proceed to describe the same in detail.

Having cut and formed the metallic sheets into suitable'blanks, 'I first prepare one `or b oth ot' the-edges which 'areto form a 4seam or joint in the usual man# ner, with a linx' to recei-veand retainsI soldering-alloy, such as by dipping them into Va'solution of mnriate of zin'c, or of sal-ammoniac, or by applyinguhereto' grease, or pulverized rosiu, or any equivalentstcr the same end.

I next dip these prepared edges into abat-h of fused metal, (by preference, of some suitable soldering-alloy, snehas tinfand lead,) and allo w thethin'coating thus obtaii1ed=the1'eon to chill and harden.

1t wilt be observed that the result of this portionof my process is not only to obtain a coating ot' fusible metalor solder along both sides of 'each edge-'so dipped, but that the iron suriaceexposed in` the edge, in cutting outthe plates, ,will be also coated, and that if the dipped edge be lifted horizontally liom ,the bath,

the coating of solder will be thickest at andalongthe very extremity of the edge..v

Having thus prepared one or botlrof the edges which are lto 'form adjoint or seam, I coat them slightly with 'pulverizcd' rosin, or other equivalent linx, (as above nam,ed,) by preferencefirst dipping them into grease, and 'then into -tlxepowdeied rosiu, and then bring and close them together, and -`holding them. in the usual manner, so as 'to forni the desired seam or joint, sweat .them, or, in other Words,' apply heat thereto'in any convenient way, either by the direct application o a hot iron to the seam, or by ,placing the seam or jointupon a hotplate, or exposing 'it to The heat will produce a fusion of the solder along and in the scams or joint, snicient to unite' tle .adjacent edges, and till up all interstices therein.

By this improved processof making and soldering tin cans, and other metallic vessels, their manufacture is reduced to the utmost simplicity'. Y

The edges of theblanks may by dipped `in the; molten metal, and thus prepared for soldering, -by women or girls.

'So soon-as thus prepared, they may be formed and shaped, and their joints swayed and closed by the-ordinary maclnnes commonly used for the purpose, alter?v which itis only necessary to run a hot-iron along the side-seams, or to place the joints upon plates, omver" a flame, s'uljlieiently hot to yfuse the solder, in order` to perfect and close the work, which may also Abe doue by womenor girls.

Mere contact of the prepared edges is alone ref quired'to produce their union, by the application of heat'hence the use of complicated machinery, fonolg taining a powerful hot-pressure, is entirely avoided.

A more perfect and far stronger seam is also obtained, than ily-mere hot-pressure, from the fact, not only that suicient solder is surely employed, but alsol because that, with tin plates, the body ot'iron neceslsarily exposed. alongthe edge in cutting the plate; is recoated before the joints are formed, iusun'ng a perfectfunion thereof with the opposite snrthce in contact therewith, which would not otherwise he the case.

Another advantage, of no small 'importance in large ihctories'is found in the great economy ot' solder obtained by my process, oneehalf less fnsbleiinetal being required' therein than where the joints are dipped, or are flowed with solder from soldering-irons,or are otherwise coated by a fusion of solder thereon' after-being formed. j

I do not claim uniting the seams and joints by heat; and pressure alone, but, having fully described my. invention,

I claim as new, and desire to secure by Letters. :Patent- They .improved method herein substantially described, et' prodncinga soldered .jointor seam in a metallic vessel, viz, byiirst dipping, into a bath of molten metal oralloy, .pne or both ot' the edges or surfaces which are to tbrnrthfezdesired ljoint or seam, so as to coat them with fusible 'metal before they are ,brought together;

and, secondly, applying heat, in any suitable manner, tothe jointor seam obtained,'byproperly placing and holding these coated edges in contact, with orv without flux, all substantially as herein set forth.

The thregoing specification of my improved process for soldering joixitsaml seams of' metallic vessels,

s igned by me this 24th day ofMay, 1869, in the pres- S. D. -BROOKSJ ence of- W.v Bolsius, J. 'Mr BURR. 

